how to add $std_name to database
<form id="form1" name="form1" method="post" action="thankstudent.php">
<table width="435" border="1" align="center" cellpadding="2" cellspacing="1" bordercolor="#000000">
<tr>
<td width="111" bgcolor="#00FFFF">Title</td>
<td width="329"><label>
<input name="title" type="text" id="title" size="80" />
</label></td>
</tr>
<tr>
<td colspan="2" align="center" bgcolor="#00FFFF"><div align="left">Description</div></td>
</tr>
<tr>
<td height="48" colspan="2" align="center"><label>
<textarea name="description" id="description" cols="905" rows="5"></textarea>
</label></td>
</tr>
<tr>
<td bgcolor="#00FFFF"><div align="left"><span class="style8">Year</span></div></td>
<td><SELECT NAME="year" size="1">
<option>2009</option>
<option>2010</option>
<option>2011</option>
<option>2012</option>
<option>2013</option>
<option>2014</option>
<option>2015</option>
<option>2016</option>
<option>2017</option>
<option>2018</option>
<option>2019</option>
<option>2020</option>
</SELECT></td>
</tr>
<td bgcolor="#00FFFF"><div align="left">Member Name</div></td>
<td><p>1.
<input name="std_name" type="text" id="st_dname" size="50" />
</p>
<p>2.
<input name="std_name" type="text" id="std_name" size="50" /> </p>

<p>3.
<input name="std_name" type="text" id="std_name" size="50" /></p>
<p>4.
<input name="std_name" type="text" id="std_name" size="50" />
</p><p>5.
<input name="std_name" type="text" id="std_name" size="50" />
</p></td><tr>
<td bgcolor="#00FFFF"><div align="left">Total Pages</div></td>
<td><label>
<input type="text" name="textfield5" id="textfield5">
</label></td>
</tr>
<tr>
<td colspan="2" align="center">

<div align="left">
<input type="submit" name="button4" id="button4" value="submit" />
<input type="reset" name="button3" id="button3" value="cancel" />
</div></td>
</tr>
</table>
</form>



receive file

CODE
<?php
include('connect_login.php');
$title = $_POST['title'];
$description = $_POST['description'];
$std_name = $_POST['std_name'];
$total_pages = $_POST['total_pages'];


$sql = "INSERT INTO `text`.`developer` (`id` ,`title` ,`description` ,`year` ,`std_name` ,`total pages` )VALUES ('', '$title', '$description', '', '$std_name', '$total_pages');";

mysql_query($sql);

?>


the error is no $std_name in database due to incorrect code
my question is "how to correct it?"